Bio 20 Review 2021

Which of the following seems to be the biggest reason for the increase in carbon dioxide in the atmosphere?

• Decomposition of waste

• The albedo of clouds

• The burning of fossil fuels

• Cellular respiration by the increase of the human population

The process by which organisms return carbon dioxide to the atmosphere is known as

• denitrification

• photosynthesis

• eutrophication

• respiration

Which process(es) would add oxygen to the atmosphere?

• 1

• 2 and 4

• 2

• 1, 3, 4

Which process(es) would add carbon dioxide to the atmosphere?

• 1

• 2 and 4

• 2

• 1, 3, 4

Which process(es) would add nutrients to the soil?

• 1 and 4

• 2 and 4

• 2

• 1, 3, 4

Which of the following compounds are the reactants for photosynthesis?

• Oxygen and carbon dioxide

• Oxygen and water

• Carbohydrates and oxygen

• Carbon dioxide and water

Which of the following elements is not found in a biotic component of the ecosystem?

• Carbon dioxide

• Oxygen

• Nitrogen

• Carbon

Which of the following gases is not a greenhouse gas?

• Carbon dioxide

• Ammonia

• Methane

• Nitrous oxide

Which of the following components of the biogeochemical cycles is found in continental rock and dissolves in the water to enter the food chain?

• Nitrogen

• Oxygen

• Phosphorous

• Carbon

Which of the following levels of the biosphere would be the most complex?

• Ecosystem

• Population

• Organism

• Community